* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body { 
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #222;
}

.loading {
  position: relative;
  display: flex;
  gap: 15px;
}

.loading span {
  position: relative;
  width: 5px;
  height: 20px;
}

.loading span::before {
  content: '';
  position: absolute;
  inset: 0;
  animation: animate 8s linear infinite;
  animation-delay: calc(var(--i) * 0.1s);
}

@keyframes animate {
  0% {
    background-color: #0f0;
    box-shadow: 0 0 5px #0f0,
    0 0 15px #0f0,
    0 0 30px #0f0,
    0 0 50px #0f0;
    rotate: 0deg;
  }
  20% {
    background-color: #0f0;
    box-shadow: 0 0 5px #0f0,
    0 0 15px #0f0,
    0 0 30px #0f0,
    0 0 50px #0f0;
    rotate: 0deg;
  }
  40% {
    background-color: #0f0;
    box-shadow: 0 0 5px #0f0,
    0 0 15px #0f0,
    0 0 30px #0f0,
    0 0 50px #0f0;
    rotate: 90deg;
    transform-origin: bottom;
    filter: hue-rotate(0deg);
  }
  80% {
    background-color: #0f0;
    box-shadow: 0 0 5px #0f0,
    0 0 15px #0f0,
    0 0 30px #0f0,
    0 0 50px #0f0;
    rotate: 90deg;
    transform-origin: bottom;
    filter: hue-rotate(360deg);
  }
  90% {
    background-color: #000;
    box-shadow: none;
    rotate: 0;
  }
  90.1%, 100% {
    background-color: #000;
    box-shadow: none;
  }
}